Colin Montgomerie will definitely miss next month's Masters after he slipped to 75th in the latest world rankings.

Montgomerie needed a top-four finish at the Miami WGC-CA tournament to get into the world top 50, the final qualification route for Augusta.

But a poor performance in Miami means the 44-year-old will miss the Masters for only the second time in 17 years.

Justin Leonard, Soren Hansen and Peter Lonard have made it to the top 50 and will line up at Augusta on April 10.

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Montgomerie has known for some time that his chances of appearing at Augusta this year were slim.

He eventually finished in a share of 65th place in Miami, effectively ending his hopes.

Northern Ireland's Graeme McDowell (61st in the rankings) and Wales' Bradley Dredge (69th) will also have to watch the Masters from the sidelines.

However England's Nick Dougherty will be in the hunt for the green jacket, despite the latest rankings placing him just outside the top 50.

Dougherty's top-eight finish at last year's US Open, plus his top 50 ranking at the end of 2007, are enough to qualify.

Paul Casey, Luke Donald, Ian Poulter, Justin Rose and Lee Westwood are the other English players confirmed for the Masters field, while former winners Ian Woosnam and Sandy Lyle will boost the British contingent.